11
FIG. 21
Upside
Down
Foam
Divider
Base Pan
Ceiling
Place Foam Divider in
(14-1/4" x 14-1/4" (±1/8")
Ceiling Opening against Base
Pan Bottom
Do Not Peel Tape Off
Adhesive
Foam Divider Ceiling
Level
(±1/4")
Tear Off
Excess
FIG. 22
Foam Divider
Adhesive
Peel Off Paper - Center Divider - Stick To
Rear Flange On Ceiling Template
c.
Install Ceiling Template
•
Peel the paper off of the foam divider and
stick it in place on the center of the rear
flange of the return air opening on the ceil-
ing template. See FIG. 22.
If bolts are left loose there may not be ad-
equate roof seal or if over tightened, damage
may ocur to the air conditioner base or ceiling
template. Tighten to specifications listed in
this manual.
CAUTION
•
Start each mounting bolt through the ceil-
ing template and up into the unit base pan
by hand.
•
EVENLY tighten the bolts to a torque of
40 to 50 inch pounds. This will com-
press the roof gasket to approximately
1/2". The bolts are self locking so over
tightening is not necessary. See FIG.
16.
d.
Use Aluminum foil tape (not supplied) to seal
the ends of the foam divider to the sides of the
opening. Make sure the area behind the flange
on the ceiling template is sealed. See FIG. 23.
Make Sure To Seal
Behind Flange
2. Center Discharge Duct Application Installation
Note: If using non-center duct installation, refer to all Non-
Center Duct Installations Section 1on page 10.
Important: A duct adapter (not supplied) must be installed
between the unit discharge and the customer installed cen-
ter duct. This duct adapter must be approved by Dometic.
a. Check gasket alignment of the air conditioner
over the roof opening and adjust if necessary.
Unit may be moved from below by slightly lift-
ing. See FIG. 12.
•
Remove return air cover, ceiling template,
foam divider and air filter from the 3308120
carton.
•
Locate the four 8" x 1/4 x 20 unit mounting
bolts, junction box cover and Romex con-
nector in the 3107180.006 bolt kit.
•
Pull down the unit's electrical cord and fas-
ten the junction box with screws to the fram-
ing in the front of the 14-1/4" x 14-1/4" (±1/
8") opening. See FIG. 14 & 15.
•
Install the Romex connector in the junc-
tion box.
b.
Installing Foam Divider
•
Cut notch in the center section of the foam
divider to fit (approximately 2 x 8 inches)
snugly around duct. See FIG. 24.
FIG. 23
Use Aluminum Foil Tape To Seal The
Foam Divider To The Sides Of 14-1/4"
x 14-1/4" (±1/8") Ceiling Opening
Route Wires
Through Slot
Catch Flange In Groove Of
Return Air Cover
Improper installation and sealing of foam di-
vider will cause the compressor to quick cycle
on the cold control. This may result in fuse or
circuit breaker opening and/or lack of cool-
ing.
CAUTION
FIG. 24
Foam
Divider
Mark And Cut 2" x 8"
Opening For Center Duct
Tape Covered
Adhesive
620615, 620625 & 620626 Installation & Operating Instructions
